基金Supported by the National Natural Science Foundation of China(10971102)the Natural Science Foundation of Jiangsu Province of China(BK2009398)+1 种基金the Foundation for the Authors of the National Excellent Doctoral Thesis Award of China(200720)Jiangsu Innovation Fund for Doctor of Science(CX07B-027z)
基金Supported by the National Natural Science Foundation of China （10231060）, the Special Research Found of Doctoral Program of Higher Education of China（200d0319003 ）, the Research Project of Xuzhou Institute of Technology（ XKY200622）.
